Peck said investigators found only three other reported injuries similar to the victim's in Texas, Ohio and Virginia.

Yang was apprehended at her residence on the 800 block of Rood Avenue, Peck said.

"We thought it was an accident," neighbor Derrick Waddell said. "We thought they dropped their baby, and we just heard she put her baby in the microwave. It's something you'd see in a horror story."

"They're very nice people," neighbor Nou Vang said. "I know the father who goes to church. I wouldn't expect any foul play or anything."

"It's sad. It's terribly sad. so many safe places baby could have ben taken to. I wish I knew," neighbor Pam Waddell said.

According to the Sacramento County Sheriff's Department jail website, Yang was booked on one count of murder and one count of assault leading to the death of a child under age 8. She is ineligible for bail.